The human skin color is constantly affected by the external environment and seasonal changes and other factors, the main one of which is the exposure to sunlight. When summer comes, human skin color will deepen because ultraviolet radiation can promote the production and metabolism of melanocytes. So moderate sunlight exposure can help the treatment of vitiligo.
However, excessive sunlight exposure can aggravate vitiligo and even lead to rapid development of vitiligo. The reason for this is probably the following: 1, excessive sun exposure can cause hyperfunction of melanocytes, triggering early apoptosis of melanocytes; 2, melanin production process, many intermediate products too much accumulation causing damage to melanocytes.
So, moderate sunlight exposure is good for vitiligo, but avoid sunlight exposure! The actual fact is that you can find a lot of people who have been in the business for a long time.